US2049157A

US2049157A - Die and method of making the same

Info

Publication number: US2049157A
Application number: US740551A
Authority: US
Inventors: Carl G Deubel
Original assignee: PROGRESSIVE SERVICE Co
Current assignee: PROGRESSIVE SERVICE Co
Priority date: 1934-08-20
Filing date: 1934-08-20
Publication date: 1936-07-28
Anticipated expiration: 1953-07-28

Description

July 28, 1936. C. G. DEUBEL 2,049,157

DIE AND METHOD OF MAKING THE SAME Filed Aug. 2o, 1954 Patented July 28, i936 UNHTED STATES 2,049,157 nm sNnME'rnon or Mame 'run sam:n

Carl G. Deubel, Shiremanstown, Pa., assignor to Progressive Service Company, St. Louis, Mo., a corporation of Missouri Application August 20, 1934, Serial No. 740,551.

Claims. (Cl. 'i6-107) This invention relates to dies and the method of making the same, and an object is to provide a novel and improved die stock nfor use in constructing clicker dies and an improved method for making a die from said stock.

Another object of the invention is to provide a stock for use in making clicker dies and comprlsixig a cold drawn steel strip possessing the necessary qualities and characteristics and essentially preshaped with a substantially fiat side which is at the inside of the die when the die isiormed and having a bevel along one marginal portion intersecting said flat side and forming an edge, the opposite marginal portion of the strip being of approximately uniform thickness from the beginning of said bevel to the opposite edge of the strip, which is substantially flat. When a die is formed from this preshaped stock, it is only necessary to file the welded corner, temper or harden the die and then remove a very few thousandths of an inch of the cutting edge margin to straighten said edge and then grind the flat inner wall and the bevel to a relatively slight extent to form the sharp cutting edge, thus dispensing with many time consuming operations required in thepresent'tedious practice of grinding the outer edge to sharp intersection with the flat inner wall. By use of my improved die stock and method of making a die therefrom, the operation of forming the die with a sharp cutting edge is greatly facilitated and the time required to make the die is reduced to a very small fraction of the time required by the present practice.

Other objects of the invention will be readily apparent from the following description, reference being made to the annexed drawing, in whichi Fig. 1 is a perspective view of a section of my l improved preshaped die stock.

Fig. 2 is a perspective view of the dieformed from the preshaped die stock before the die has been sharpened or straightened after hardening.

Fig. 3 is a sectional view on the line 3-3 of I Fig. 2 after the die has been hardened, straightened and sharpened.

' The stock is preshaped substantially as shown in Fig. 1 before bending to form the die and comprises a cold drawn steel strip having a iiat wall I at one side, a marginal portion 2 of approximately uniform thickness from the pressure receiving iiat edge 3 to a line 4 from which an arcuate bevel 5 extends to intersection with the wall I to form an attenuated edge 8 approximately parallel with the ilat pressure receiving edge 3. I have found that this preformed cold drawn steele stock can be obtained, finished and held to a very close tolerance with respect to the edge 6 and also withvrespect to the height of the die. The strip of cold drawn steel when pre- 6 shaped in this manner requires only bending to form the die, welding the abutting ends 1, ling a very small amount of material from the welded ends,ltempering or hardening, andsharp'ening.

The sharpening is performed by removing a 10 small amount of material from the edge 6 in order to straighten the edge and then grinding or filing the marginal portion of the flat inner wall I and the margin of the bevel 5 to form a sharpening wall 8 along a line 8', and extending 15 to sharp intersection with the wall I. Thus, by use of this improved die stock and by these operations a sharp cutting edge `9. is quickly -and easily provided and the die is complete.

Heretofore the straightening of clicker dies 'after they have been hardened has been a considerable problem and it was necessary to provide a considerable allowance for grinding. The allowance -has been approximately V8 of an inch but by my improved die stock and method it is necessary only to provide an allowance or tolerance of approximately .020 of an inch for cleaning of the top and bottom of the die after the die has been formed.

In bending the stock to i'orm the die, the stock 30 is heated only at the points being bent and very quickly in order not to change the quality or character or temper of the metal to any desired extent.

By my improved die stock and method of making a die therewith, considerable advantages and savings are obtained in the particulars mentioned, namely, in the allowance for grinding and in the time required for performing the finishing opera- 40 tions. As compared with the present procedure by my improved method, I eliminate the first tting, insid'e ling along the wall I, grinding the outer surface, and second iitting, which operations consume approximately 80% of the time 45 and labor required in manufacturing clicker dies.

I claim:

1. The method of forming aclicker die which comprises bending into permanent clicker die form a cold drawn steel strip having a pressure receiving edge, a flat vertical inner wall and a bevel on the outer side opposite said pressure receiving edge curving to intersection with said flat wall, tempering and hardening the die, straightening the upper edge of the die, and removing 5 5 material at an angle to said bevel and said ilat wall to form a sharp cutting edge.

2. The method of making a clicker die which comprises cold drawing a steel strip to i'orm die stock having a substantially sharp drawn edge, bending said stock to clicker die shape and welding the adjacent ends thereof, straightening and hardening the shaped stock, and sharpening said edge to complete the die.

3. 'I'he method of making a clickerdie which comprises cold drawing a steel strip to form die stock having a curved beveled side intersecting the oppositeside to form a substantially sharp Idrawn edge, Vforming a clicker die from said stock,

rand sharpening said edge to complete the die.

4. Clicker die stock comprising cold drawn steel having a vertical side and a beveled opposite side, said sides intersecting to form a substantially sharp edge, the body portion of said die being substantially ot finished 'ciicker die cross-sectional dimensions.

5. Clicker die stock comprising cold drawn steel having a vertical side and a curved beveled opposite side, said beveled vside curving to intersect with Isaid vertical side to form a substantially 10 sharp edge, the body portion ot said stock being substantially of ilnished clicker die cross-sectional dimensions.

CARL G. DEUBEL.